[riot-notifications] [RIOT-OS/RIOT] pkg/semtech_loramac: deadlock with UNCONFIRMED messages (#11530)

José Alamos notifications at github.com
Thu May 16 11:12:28 CEST 2019

Thanks for pointing this out. Reading your detailed description, this can indeed happen. Maybe this is the issue @smlng was experiencing.

One way to solve this is to make send/recv asynchronous, so the application thread only receives downlink messages and there's no expected synchronization between the application thread and the MAC layer thread. That's what I'm doing in [GNRC LoRaWAN](https://github.com/RIOT-OS/RIOT/pull/11022) to avoid deadlocks.

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